Safety razor



y F. H. EVE ETAL 2,379,479,

SAFETY RAZOR Filed May 21, 1943 FIG. F/G.2.

In venlors 54 v:

' Attorneys Patented July 3, 1945 SAFETY RAZOR. Frank Henry Eve and Albert "Edward Clarke,

Luton, England Application May 21, 1943,

Serial Nb. 487,928

I In Great Britain July 20, 1942 v 9 Claims. (01. 30-50) This invention relatesto safety razors in which a double-edged blade is clamped in a holder comprising a guard, a rigid backing and a handle. Hitherto the blades of such razors have been of thewafer: type. such blades are considered unsuitable for heavy beards, for which the so-called solid or hollow-ground blade is preferred, which blades however have only one edge. It has been double-edged blades of the solid, hollow-groundtype for use with holders of the kind in question, but so far as we are aware such blades have never come into use. I

It is an object of this invention to provide a double-edged hollow-ground blade suitable for use in a holder of the kind set forth.

It is another object of the invention to provide a hollow-ground blade which will readily adjust itself to the convex surface of a double-edged guard of 'a holder.

A further object of this invention is to provide an improved safety razor for the reception of our new blade.

Our new blade comprises two components each having a cutting edge and hinged together at the edges opposite to the cutting edges, so as to constitute a single double-edged blade which can fold about its median line, each component being of the solid hollow-ground type.

of the components maybe cut away in the manner of the leaves of a door hinge, one of them having a central lug fitting between two lateral lugs on the other, the three lugs being bored to receive a hinge pin or pins. It will be seen that such a hinged blade can adjust itself to the convex surface of the double-edged guard of a holder similar to that commonly used for double-edged wafer blades, the rigid backing being made somewhat deeper to accommodate thethickness of the improved blade at its center.

Referring to the accompanying drawing,

Figure 1 is a plan of a razor blade according to this invention; Figure 2 is an end elevation of the blade;

Figure 3 is an end elevation of the complete razor with the blade in place;

Figure 4 is a perspective view of the blade;

Figure 5 is a perspective view of the guard forming part of the holder;

Figure 6 is a fragmentary view in section of the handle;

Fig. 7 is a perspective view of the complete device as shown in Fig. 3.

Referring first to Figures 1 and 2, one component ill of the blade is cut away at its thick edge to provide a lug l2 and the other component as is part of the component I4 is cut away to provide two lugs l6 which straddle the lug l2. Th .three lugs are bored to receive hinge pins [8 which are fixed rigidly in the lugs I6, the componentlfl being ableto turn freely on these-pins. Part of the central lug I2 is cut away, l4, so as to form an opening 20 through which a screw-.22 fixed tov the backing 24 may project. The sides of this hole 22 are flared or tapered on both sides of the lug to enable the screw 22 whichever side of the composite blade is against theguard 26 and to allow the blade to conform to the curve of the holder.

As will be seen from Figure 3,'the holder is similar to the well-known Gillette holder, consisting of a guard '26, the backing 24 with its screw 22 and a handle 28 having a screw-threaded hole 30(Figure 6) to receive the screw 22. The backing .24 is deeper and curved to a smaller radius than that of the customary holder for use with wafer blades, this being necessary on account of the greater thickness of the central portion of the improved blade.

The blade is assembled with the razor in the same manner as the ordinary double-edged wafer blade. It is held with its edges parallel to the edges of the guard 26 by two tongues or projections 32 which enter notches 34 in the lugs I6. As will be clear from Figure 4, the

each of the lugs l6 and of the hinge pins I8. Each notch is closed on one side by the edge of the cut-away portion of the blade component [0 and the other side of thenotch is so located the notch lie symmetrically on opposite sides of the centre line when the blade is in contact with the concave side of the guard. As the notch is symmetrical either side or face of the blade may be in contact with the guard.

In order to ensure that the razor shall not be used if by inadvertence the blade is assembled with the guard in an oblique or skew position, the screw-threaded hole 30 is counter-bored for a portion of its length as indicated at 36. If the blade is'not squarewith the tions 32 will not enter the notches 34 and they will hold the blade out of contact with the guard.

to pass through the hole' that the edges of guard, the projec- .one another .and embracing said first J-lug, spivoti means'interconnecting :said ifirst lug with each c-fisaid other lugs.

made aware that he has assembled the blade incorrectly.

The recesses 34 also serve to locate the blade in the holder of a sharpening device, such for example as one of the rotary type described in the specification of our British Patent No. 540,853.

We claim:

1. A safety-razor blade comprisingttwo components ofthe' solid hollow-ground type each hav ing a cutting edge and hinged together at the edges opposite to the cutting edges to constitute a single double-edged blade which can told about its median line.

2. A safety-razor blade comprising two-components of the solid hollow-ground type-each having a cutting edge, the thick edges of said components being cut away tolformhinge zlugs, and pivot means interconnecting said lugs.

3. A safety-razor blade comprising two come ponents of the solid hollow-ground type each having .a cutting sedge, one of saidcomp'onents :beingiformed at r-itsa thick' edge with a hinge :lug ,and the second-of said=componentsbeing formed at its edgevwithtworhinge .lugstspacedapart from 'and L 45A safety-razoribladeias defined in claim 3 .wherein-.said firstdugis formed-with -a transverse :opening toreceive azscrew projecting. from a =30 iprisin'g two .backing member. of asafetyrazor.

5; A safety razor .comprisingra guard-.andaa backing member and a blade lheldsbetween said Lguardia'nd said backing member-, -:saicl blade comprising :two Lcomponents of the solid hollow- 35 :backing. member'v and: a blade ground 'type tingzedges.

ground type each having a cutting edge and. hinged together at the, edges opposite to the cutting edges'to constitute a single double-edged -blade which can fold about its median line.

6. A safety razor as defined in claim 5 wherein said. guard is formed at each end with a projection and said blade is formed at each end with a recess,.said recesses and projections being complementary to one another and adapted to locate said blade accurately in position on said guard. '7 A safety razor comprising a guard, a backing member, a handle and a double-edged hollowiground blade, said guard and said blade being formed with complementary locatin projections "and "rece'sse's,said backing member bearing a with said handle, and said that is internally screwsorew but the entrance of which is unthreaded for a distance sufiicient to prevent said screw engaging said thread in the screw for engagement event :thatsaid (projections and recesses are not inengagementwith'one another.

. 2381A safety-razorzablade comprising two components of .the Jso1id-hollow ground ftype each having a cutting edge: and r'hinged. together atxthe edges opposite atothe cutting edges.

' 9. A safety razor :comprising -a guard and a .hEldbEtWEED. said guard and isaid 'baclring member; saidi'blade comcomponents :of the solid holl'owseach havingla cutting edge and hinged together at ithe'edge's oppositato the'cut- PFRANK anvn.

AIBERT EDWARDCLARKE 

